Microsoft’s first 50 years trace a shift from selling tools for early personal computers to building platforms used by consumers, businesses, gamers and developers. Founded in 1975 by Bill Gates and Paul Allen, the company began with Altair BASIC; its later milestones include Windows, Office, Xbox, Azure and today’s AI ambitions. That is Microsoft’s own anniversary framing, not proof that one company alone created the PC, cloud or AI revolutions.
What was Microsoft’s first product?
Microsoft identifies an interpreter for the BASIC programming language, developed for the Altair 8800, as its first product. The 1975 starting point reveals an enduring thread: Microsoft has repeatedly built tools and platforms that let others use or create technology. At its 50th-anniversary event on April 4, 2025, chairman and CEO Satya Nadella described the original idea this way: “Fifty years ago, Bill and Paul started Microsoft with a simple but powerful idea: to build technology so people everywhere could build more technology.” Microsoft’s anniversary remarks provide the company’s account.
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How did Microsoft change over 50 years?
The milestones show Microsoft changing its relationship with users: first as a software maker, then as a central PC platform provider, later as a gaming and cloud-services company, and now as a major investor in AI tools and infrastructure. The dates below come from Microsoft’s anniversary milestone gallery, which the company presents as a selection of milestones rather than a complete history.
1975–1995: Software helps make the PC practical
After starting with Altair BASIC, Microsoft moved into the mainstream as personal computers spread. It went public on March 13, 1986. Its first Office version reached the market on June 19, 1989, and Windows 3.0 arrived in spring 1990. On August 24, 1995, Bill Gates announced Windows 95, bringing the operating system into a new phase of mass-market PC use. These milestones mark Microsoft’s growing influence in personal computing; they do not mean it invented the computer or the broader PC industry.
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2000–2001: Leadership changes as Windows and Xbox expand the audience
Steve Ballmer became Microsoft’s second CEO on January 13, 2000. Windows XP went on sale October 25, 2001, and the original Xbox followed on November 15, 2001. Xbox was a significant move into console gaming and a relationship with players beyond the office and desktop—not an invention of video games or console gaming.
2008–2014: From licensed products toward cloud and devices
Microsoft announced Windows Azure in October 2008, an early marker of its shift toward delivering computing services over the internet. The company released its first in-house-designed Surface PC on October 26, 2012, adding its own computer hardware to a business long associated with software and partner-made PCs. Satya Nadella succeeded Ballmer as CEO in February 2014.
2015 onward: A wider mission and AI-centered ambitions
Microsoft says Nadella evolved the company’s mission wording in 2015. Its current formulation is “to empower every person and every organization on the planet to achieve more.” In 2025 anniversary remarks, Nadella described Microsoft’s evolution as a move from developer tools to a platform company and connected its AI efforts to Copilot and developer agents. Those are leadership statements about strategy and direction, not evidence that all anticipated benefits have already been achieved. Nadella also said, “Our future will not be defined by what we have built, but what we empower others to build,” and, “Our mission has not changed, it’s only expanded.”
What is Microsoft focused on now?
Microsoft’s current strategy spans cloud services, business software, Windows and devices, gaming, and AI. A useful measure of the company’s business today is its own reported performance, but revenue growth should not be mistaken for a measure of social impact or historical influence.
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| Business area | Microsoft-reported result | Period and qualification |
|---|---|---|
| Microsoft Cloud | Revenue increased 23% to $168.9 billion | Microsoft FY2025; fiscal year ended June 30, 2025 |
| Microsoft 365 Commercial products and cloud services | Revenue increased 14% | Microsoft FY2025; fiscal year ended June 30, 2025 |
| Server products and cloud services | Revenue increased 23% | Microsoft FY2025; fiscal year ended June 30, 2025 |
| Windows OEM and Devices | Revenue increased 3% | Microsoft FY2025; fiscal year ended June 30, 2025 |
| Xbox content and services | Revenue increased 16% | Microsoft FY2025; fiscal year ended June 30, 2025 |
These figures are from Microsoft’s FY2025 annual report. They show the scale and momentum of reported business lines, not how much Microsoft has changed society or technology.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What do the 50 years add up to?
Microsoft’s anniversary is best understood as a history of changing roles rather than a string of product launches: developer-tool maker, PC software and platform provider, gaming entrant, cloud-services operator, and AI-focused platform company. The company’s own milestones make that arc visible, while its financial report shows the continuing weight of cloud and commercial software alongside Windows and Xbox. The broader impact of those products is real but cannot be reduced to the revenue figures reported for one fiscal year.
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